CAS No.:131-91-9

TOXICITY DATA with REFERENCE：

1.		mmo-sat 10 µg/plate		ENMUDM    Environmental Mutagenesis. 3 (1981),499.
2.		dnr-bcs 10 mmol/L		JNSVA5    Journal of Nutritional Science and Vitaminology. 25 (1979),317.

mouse	LD50	unreported	400mg/kg (400mg/kg)		British Journal of Cancer. Vol. 6, Pg. 160, 1952.
rat	LDLo	oral	500mg/kg (500mg/kg)		National Academy of Sciences, National Research Council, Chemical-Biological Coordination Center, Review. Vol. 5, Pg. 35, 1953.

Consensus Reports：Reported in EPA TSCA Inventory.
SAFETY PROFILE：
Moderately toxic by ingestion. Many nitroso compounds are carcinogens. Ignites when heated to 124°C. Mutation data reported. When heated to decomposition it emits toxic fumes of NO_x. See also NITROSO COMPOUNDS.
Hazard Codes:
    Xn: Harmful
Risk Statements about 1-NITROSO-2-NAPHTHOL(131-91-9):
    R22 Harmful if swallowed.
    R33 Danger of cumulative effects.
    R20/21/22: Harmful by inhalation, in contact with skin and if swallowed.
    R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements about 1-NITROSO-2-NAPHTHOL(131-91-9):
    S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
    S36 Wear suitable protective clothing.
    S45 In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)